fix: can't ping

package.json

@@ -1,6 +1,6 @@
 {
   "name": "muffin-ai-arujak",
-  "version": "2.0.0-77-oreo",
+  "version": "2.0.0-78-oreo",
   "main": "dist/index.js",
   "private": true,
   "dependencies": {

src/modules/database/database.ts

@@ -22,7 +22,10 @@ export class MaaDatabase {
   }
 
   public async ping() {
-    await this._database.ping()
+    this._database.getConnection().then(conn => {
+      conn.ping()
+      conn.release()
+    })
   }
 }